1. Na-adjective (keiyodoshi), Noun

   1.

   unclear; obscure; indistinct; uncertain

2. Noun which may take the genitive case particle 'no', Suffix

   2.

   unknown; unidentified

3. Noun

   3.

   ignorance; lack of wisdom; lack of insight

Example sentences

• トムは行方不明なの？

  Is Tom missing?

• 火事の原因は不明だ。

  The cause of the fire is not known.